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发明名称
WEHNELT-CATHODE
摘要
申请公布号
CA315487(A)
申请公布日期
1931.09.22
申请号
CAD315487
申请日期
申请人
THE RADIO CORPORATION OF AMERICA
发明人
ENGBERT HARMEN REERINK;JOHANNES GIJSBERTUS WILHELM MULDER
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